Frost mages are TERRIBLE for end game.

The rotation for druids is a priority based rotation like ret is... i'm not exactly sure how it would work out but i'm sure it would be fine. Kitty DPS is pretty straight forward... to put it lightly make sure mangle is up and mash other main attacks =P I use to know a kitty DPS in team ice who pulled 10k before 3.1 and just under 10k afterwards... i havn't played in a while so i dont know his current dps but with good gear kitties can be great.

I would also suggest mutilate rogues. Having one macro'd to keep up expose armor and the other 2 just using their ruptureless rotation. Could be fun.